Automatically save memory if content triggers the threshold
AI agents use auto_save_memory to create or update resources in SAM — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SAM environment.
This tool performs a write operation by automatically persisting memory content when specified conditions are met. It creates or stores data reversibly (memory can be deleted via the sibling 'delete_memory' tool), making it a Write-category tool.
From the tool's definition Tool name 'auto_save_memory' and description 'Automatically save memory if content triggers the threshold' indicate the tool creates or persists data (memory records).
Documented attack patterns abuse exactly the kind of access auto_save_memory gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SAM, and nothing reaches the server without passing your rules. This is the rule we recommend for auto_save_memory:
{
"version": "1",
"default": "deny",
"tools": {
"auto_save_memory": {
"limits": [
{
"counter": "auto_save_memory_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}auto_save_memory stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Automatically save memory if content triggers the threshold. It is categorised as a Write tool in the SAM MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the SAM MCP server in PolicyLayer and add a rule for auto_save_memory: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches SAM. Nothing to install.
auto_save_memory is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the auto_save_memory rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for auto_save_memory. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
auto_save_memory is provided by the SAM MCP server (pigrieco/mcp-memory-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SAM, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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37 SAM tools catalogued and risk-classified — across an index of 43,000+ MCP servers.